Revert "unpack-objects: prevent writing of inconsistent objects"

[git.git] / builtin-unpack-objects.c

diff --git a/builtin-unpack-objects.c b/builtin-unpack-objects.c
index a6ff62fd8c66f075550e01718acf56d90b44d4bb..50e07faa12f495b3270e1446573b88a255336877 100644 (file)
--- a/builtin-unpack-objects.c
+++ b/builtin-unpack-objects.c
@@ -8,6 +8,7 @@
 #include "tag.h"
 #include "tree.h"
 #include "progress.h"
+#include "decorate.h"
 
 static int dry_run, quiet, recover, has_errors;
 static const char unpack_usage[] = "git-unpack-objects [-n] [-q] [-r] < pack-file";
@@ -18,6 +19,18 @@ static unsigned int offset, len;
 static off_t consumed_bytes;
 static SHA_CTX ctx;
 
+struct obj_buffer {
+       char *buffer;
+       unsigned long size;
+};
+
+static struct decoration obj_decorate;
+
+static struct obj_buffer *lookup_object_buffer(struct object *base)
+{
+       return lookup_decoration(&obj_decorate, base);
+}
+
 /*
  * Make sure at least "min" bytes are available in the buffer, and
  * return the pointer to the buffer.
@@ -189,6 +202,7 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
        void *delta_data, *base;
        unsigned long base_size;
        unsigned char base_sha1[20];
+       struct object *obj;
 
        if (type == OBJ_REF_DELTA) {
                hashcpy(base_sha1, fill(20));
@@ -252,6 +266,15 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
                }
        }
 
+       obj = lookup_object(base_sha1);
+       if (obj) {
+               struct obj_buffer *obj_buf = lookup_object_buffer(obj);
+               if (obj_buf) {
+                       resolve_delta(nr, obj->type, obj_buf->buffer, obj_buf->size, delta_data, delta_size);
+                       return;
+               }
+       }
+
        base = read_sha1_file(base_sha1, &type, &base_size);
        if (!base) {
                error("failed to read delta-pack base object %s",
@@ -311,7 +334,7 @@ static void unpack_one(unsigned nr)
 static void unpack_all(void)
 {
        int i;
-       struct progress progress;
+       struct progress *progress = NULL;
        struct pack_header *hdr = fill(sizeof(struct pack_header));
        unsigned nr_objects = ntohl(hdr->hdr_entries);
 
@@ -322,15 +345,13 @@ static void unpack_all(void)
        use(sizeof(struct pack_header));
 
        if (!quiet)
-               start_progress(&progress, "Unpacking %u objects...", "", nr_objects);
+               progress = start_progress("Unpacking objects", nr_objects);
        obj_list = xmalloc(nr_objects * sizeof(*obj_list));
        for (i = 0; i < nr_objects; i++) {
                unpack_one(i);
-               if (!quiet)
-                       display_progress(&progress, i + 1);
+               display_progress(progress, i + 1);
        }
-       if (!quiet)
-               stop_progress(&progress);
+       stop_progress(&progress);
 
        if (delta_list)
                die("unresolved deltas left after unpacking");